A mechanical counter preventing reverse rotation

Abstract

The design objective of the present invention is to provide a mechanical counter that prevents reverse rotation. To achieve the above technical objective, the following technical solution is provided: a mechanical counter that prevents reverse rotation, comprising a counter housing, wherein character wheels are sequentially meshed and driven in the housing, wherein the first character wheel is connected to a first rotating shaft, the first rotating shaft is connected to a first driving member, a second driving member meshed with the first driving member is connected to the counter housing, the second driving member meshes with the first character wheel via the second rotating shaft, wherein both the first driving member and the second driving member are provided with a latching structure, wherein when the first driving member is toggled clockwise, the first driving member drives the first character wheel to rotate clockwise, and the second driving member does not play a transmission role, and when the first driving member is toggled counterclockwise, the second driving member drives the first character wheel to rotate clockwise, and the first driving member does not play a transmission role.

Description

Technical Field

[0001] The present invention relates to a counter, and more particularly to a mechanical counter capable of preventing reverse rotation. Background Art

[0002] A mechanical counter has multiple character wheels arranged in sequence, generally arranged from low to high in a decimal system. The first character wheel is the lowest-order wheel, and a carry wheel is located between adjacent character wheels. Each rotation of the lower-order wheel causes the carry wheel to rotate one space, which in turn causes the adjacent higher-order wheel to rotate one space, completing the carry operation. Between the opposing sides of the adjacent character wheels, the lower-order wheel has a tooth ring with a groove cut into its circumference, while the higher-order wheel has a number of teeth corresponding to the decimal system. Each rotation of the lower-order wheel causes the carry wheel to rotate one space, causing the higher-order wheel to rotate one space.

[0003] For example, Patent No. CN3160944Y, published by the Chinese Patent Office on April 6, 1994, describes a mechanical counter. This device uses a cross-shaped carry wheel for carry transmission. When the lower-order character wheel rotates forward or reverse one revolution, the cross-shaped carry wheel transmits a bidirectional carry count (addition or subtraction) to the upper-order character wheel. However, in actual use, mechanical counters can experience reverse rotation for various reasons, including malicious human modification, resulting in a certain deviation from actual counts.

[0004] Therefore, the technical problem to be solved by the present invention is to prevent the counter from rotating in the reverse direction and ensure the accuracy of counting. Summary of the Invention

[0005] The design purpose of the present invention is to provide a mechanical counter which can prevent reverse rotation.

[0006] In order to achieve the above technical purpose, the following technical solution is specially provided: a mechanical counter that prevents reverse rotation, including a counter housing, in which character wheels are sequentially meshed and transmitted, wherein the first character wheel is connected to a first rotating shaft, a first driving member is connected to the first rotating shaft, a second driving member meshed with the first driving member is connected to the counter housing, and the second driving member is meshed with the first character wheel through the second rotating shaft, wherein both the first driving member and the second driving member are provided with a locking structure, when the first driving member is turned clockwise, the first driving member drives the first character wheel to rotate clockwise, and the second driving member does not play a transmission role, when the first driving member is turned counterclockwise, the second driving member drives the first character wheel to rotate clockwise, and the first driving member does not play a transmission role.

[0007] According to the above technical solution, in this technical solution, the character wheels in the counter housing are meshed with each other to form a fixed transmission system, and the first character wheel plays the role of the first transmission. The first character wheel is connected to the first driving member and the second driving member via the first rotating shaft and the second rotating shaft, respectively. Therefore, both driving members can drive the first character wheel to rotate. The two driving members are in a meshing state. This means that when the first driving member rotates clockwise, the second driving member rotates counterclockwise, and vice versa. Therefore, as long as the clockwise rotating driving member can always drive the first character wheel to rotate via the corresponding rotating shaft, the entire counter can be guaranteed to maintain a fixed rotation direction, even when the first driving member is turned counterclockwise. To achieve this effect, a locking structure is provided on both the first driving member and the second driving member. When the first driving member is turned clockwise, the first driving member drives the first character wheel to rotate clockwise, and the second driving member does not play a transmission role. When the first driving member is turned counterclockwise, the second driving member drives the first character wheel to rotate clockwise, and the first driving member does not play a transmission role.

[0008] In order to achieve the above-mentioned technical effects, the present technical solution is further configured as follows: the first driving member and the second driving member are both axially grooved with a card slot, wherein the card slot structure includes a gear sleeved on the first driving member or the second driving member and a card strip movably connected to the gear. The first driving member and the second driving member are engaged through the gears, and the card strip is hooked into the card slot on the corresponding driving member to drive the corresponding driving member to rotate.

[0009] The technical solution is further optimized as follows: the clamping strips connected to the two gears are arranged in opposite directions to each other.

[0010] The technical solution is further optimized to be configured as follows: the gear is clearance-fitted with the first driving member and the second driving member.

[0011] The technical solution is further optimized as follows: the clip is arranged in an arc-shaped structure, one end of which is movably fixed on the gear, and the other end is provided with a clip hook.

[0012] This technical solution is further optimized as follows: a fixing protrusion is provided at the position of the gear for fixing the clip strip, a fixing part is detachably connected to the fixing protrusion, and a fixing through hole is provided at the opposite end of the clip strip, wherein the diameter of the fixing through hole is larger than the diameter of the fixing protrusion and smaller than the diameter of the fixing block. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0014] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0015] Figure 3 The structure of the present invention is shown in FIG. Figure 1 ;

[0016] Figure 4 The structure of the present invention is shown in FIG. Figure 2 .

[0017] In the figure: 1. Counter housing; 2. Character wheel; 3. First character wheel; 4. First rotating shaft; 5. First driving member; 6. Second rotating shaft; 7. Second driving member; 8. Gear; 9. Clip; 10. Fixing through hole; 11. Clip hook; 12. Fixing protrusion; 13. Fixing block; 14. Clip slot. DETAILED DESCRIPTION

[0018] Reference Figures 1 to 4 The embodiments of the present invention are further described.

[0019] A mechanical counter that prevents reverse rotation includes a counter housing 1, in which character wheels 2 are sequentially coupled and driven inside the housing, wherein the first character wheel is connected to a first rotating shaft 3 and a first character wheel 4, wherein the first rotating shaft 3 and the first character wheel 4 are connected to a first driving member 5, and the counter housing 1 is connected to a second driving member 7 that meshes with the first driving member 5, and the second driving member 7 meshes with the first character wheel through a second rotating shaft 6, wherein both the first driving member 5 and the second driving member 7 are provided with a latching structure, and when the first driving member 5 is dialed clockwise, the first driving member 5 drives the first character wheel to rotate clockwise, and the second driving member 7 does not play a transmission role, and when the first driving member 5 is dialed counterclockwise, the second driving member 7 drives the first character wheel to rotate clockwise, and the first driving member 5 does not play a transmission role.

[0020] According to the above technical solution, in this technical solution, the character wheels 2 within the counter housing 1 are mutually coupled to form a fixed transmission system, with the first character wheel serving as the first transmission. The first character wheel 2 is connected to the first drive member 5 and the second drive member 7 via the first shaft 3, the first character wheel 4, and the second shaft 6, respectively. Therefore, both drive members can drive the first character wheel to rotate. Since the two drive members are mutually coupled, when the first drive member 5 rotates clockwise, the second drive member 7 rotates counterclockwise in the opposite direction, and vice versa. Therefore, as long as the clockwise driving member can always drive the first character wheel to rotate via the corresponding shaft, the entire counter can maintain a consistent rotation direction, even when the first drive member 5 is turned counterclockwise. In order to achieve this effect, a latching structure is provided on both the first driving member 5 and the second driving member 7. When the first driving member 5 is dialed clockwise, the first driving member 5 drives the first letter wheel to rotate clockwise, and the second driving member 7 does not play a transmission role. When the first driving member 5 is dialed counterclockwise, the second driving member 7 drives the first letter wheel to rotate clockwise, and the first driving member 5 does not play a transmission role.

[0021] The specific setting method of the locking structure is as follows: the first driving member 5 and the second driving member 7 are both axially grooved with a locking groove, wherein the locking structure includes a gear 8 sleeved on the first driving member 5 or the second driving member 7 and a clamping strip 9 movably connected to the gear 8. The first driving member 5 and the second driving member 7 are engaged through the gear 8, and the clamping strip 9 hooks the locking groove on the corresponding driving member to drive the corresponding driving member to rotate.

[0022] At this time, the strip 9 on the gear 8 of the second driving member 7 will hook the slot and drive the second driving member 7 to rotate, thereby ensuring that the counter will not rotate in the opposite direction no matter how it is turned.

[0023] In order to ensure that the rotation of the gear 8 itself does not directly drive the driving member to rotate, it is necessary to ensure that the gear 8 is clearance-fitted with the first driving member 5 and the second driving member 7 .

[0024] Among them, the card strip 9 plays a very important role in this technical solution. In order to better ensure the specific effect of the card strip 9, the card strip 9 is set in an arc structure corresponding to the driving member for better adaptation. One end of the card strip 9 is movably fixed on the gear 8, and the other end is provided with a hook 11, which realizes the specific function of hooking the card slot.

[0025] During the specific installation process, since the gear 8 is provided with a fixing protrusion 12 at the position for fixing the clip 9, and a detachably connected fixing piece is provided on the fixing protrusion 12, the clip 9 is provided with a fixing through hole 10 at its opposite end, wherein the diameter of the fixing through hole 10 is larger than the diameter of the fixing protrusion 12 and smaller than the diameter of the fixing block 13, the clip 9 is put on the fixing protrusion 12 and then the fixing piece is used to achieve specific fixation.

[0026] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A mechanical counter for preventing reverse rotation, comprising a counter housing (1), wherein character wheels (2) are sequentially engaged and driven in the housing, wherein the first character wheel (3) is connected to the first rotating shaft (4), characterized in that The first rotating shaft (4) is connected to the first character wheel (3) with a first driving member (5), and the counter housing (1) is connected to a second driving member (7) meshed with the first driving member (5). The second driving member (7) is meshed with the first character wheel through the second rotating shaft (6). The first driving member (5) and the second driving member (7) are both provided with a latching structure. When the first driving member (5) is dialed clockwise, the first driving member (5) drives the first character wheel to rotate clockwise, and the second driving member (7) does not play a transmission role. When the first driving member (5) is dialed counterclockwise, the second driving member (7) drives the first character wheel to rotate clockwise, and the first driving member (5) does not play a transmission role. The first driving member (5) and the second driving member (7) are both axially grooved with a latching groove, and the latching structure includes a latching structure sleeved on the first driving member (5) or the second driving member (7). The first drive member (5) and the second drive member (7) are meshed through the gear (8) and hooked on the slot on the corresponding drive member through the clip (9), driving the corresponding drive member to rotate. The clips (9) connected to the two gears (8) are arranged in opposite directions. The gear (8) is clearance-matched with the first drive member (5) and the second drive member (7). The clip (9) is arranged in an arc-shaped structure, one end of which is movably fixed on the gear (8) and the other end is provided with a clip (11). A fixing protrusion is provided at the position of the gear (8) for fixing the clip (9), and a fixing member detachably connected to the fixing protrusion is provided. The clip is provided with a fixing through hole at the opposite end thereof, wherein the diameter of the fixing through hole is larger than the diameter of the fixing protrusion and smaller than the diameter of the fixing block.

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